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REMOVAL OF NITROGEN OXIDES FROM AIR BY CHEMICALS - IMPREGNATED CARBONS
Yakeuchi, Yasushi,Yanagisawa, Kohjiro,Tanaka, Yuhsuke,Tsuruoka, Noriyuki 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5
Fixation of nitrogen oxides (NO_x) in air onto granular activated carbon impregnated with chemicals was attempted to improve removal efficiency of NO_x by activated carbon adsorption. Nitric oxide (NO) and nitrogen dioxide (NO₂), were tried to remove by a flow test. Fixed-bed adsorption breakthrough curves were obtained when some kinds of carbon were used. The amount adsorbed of NO₂changed with the amount and kinds of metallic salts impregnated. Chemicals-impregnated carbons were prepared from a commercial activated carbon. Among obtained carbons, the one which showed the highest selectivity for NO_x was chosen, and its performance with the change in humidity was determined. Removal mechanism of NO₂was estimated, and the carbon impregnated with potassium hydroxide was found to be superior to any other carbon tested. The amount of the adsorbed NO and that produced by the reduction of NO₂were determined from the breakthrough curves.
Articles : Removal of Nitrogen Oxides from Air by chemicals-Impregnated carbons
( Yasushi Takeuchi ),( Kohjiro Yanagisawa ),( Yuhsuke Tanaka ),( Noriyuki Tsuruoka ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.5
Fixation of nitrogen oxides (NO_x) in air onto granular activated carbon impregnated with chemicals was attempted to improve removal efficiency of NO_x by activated carbon adsorption. Nitric oxide (NO) and nitrogen dioxide (NO₂), were tried to remove by a flow test. Fixed-bed adsorption breakthrough curves were obtained when some kinds of carbon were used. The amount adsorbed of NO₂changed with the amount and kinds of metallic salts impregnated. Chemicals-impregnated carbons were prepared from a commercial activated carbon. Among obtained carbons, the one which showed the highest selectivity for NO_x was chosen, and its performance with the change in humidity was determined. Removal mechanism of NO₂was estimated, and the carbon impregnated with potassium hydroxide was found to be superior to any other carbon tested. The amount of the adsorbed NO and that produced by the reduction of NO₂were determined from the breakthrough curves.